Search for invisibly decaying Higgs bosons in e+e- → Z0h0 production at √s=183-209 GeV

被引:19
|
作者
Abbiendi, G. [3 ,4 ]
Ainsley, C. [7 ]
Akesson, P. F. [1 ]
Alexander, G. [23 ]
Anagnostou, G. [2 ]
Anderson, K. J. [9 ,10 ]
Asai, S. [24 ,25 ,26 ]
Axen, D. [30 ]
Bailey, I. [29 ]
Barberio, E. [1 ]
Barillari, T. [35 ]
Barlow, R. J. [17 ]
Batley, R. J. [7 ]
Bechtle, P. [28 ]
Behnke, T. [28 ]
Bell, K. W. [21 ]
Bell, P. J. [2 ]
Bella, G. [23 ]
Bellerive, A. [8 ]
Benelli, G. [6 ]
Bethke, S. [35 ]
Biebel, O. [34 ]
Boeriu, O. [11 ]
Bock, P. [12 ]
Boutemeur, M. [34 ]
Braibant, S. [3 ,4 ]
Brown, R. M. [21 ]
Burckhart, H. J. [1 ]
Campana, S. [6 ]
Capiluppi, P. [3 ,4 ]
Carnegie, R. K. [8 ]
Carter, A. A. [14 ]
Carter, J. R. [7 ]
Chang, C. Y. [18 ]
Charlton, D. G. [2 ]
Ciocca, C. [3 ,4 ]
Csilling, A. [32 ]
Cuffiani, M. [3 ,4 ]
Dado, S. [22 ]
De Roeck, A. [1 ]
De Wolf, E. A. [1 ]
Desch, K. [28 ]
Dienes, B. [33 ]
Dubbert, J. [34 ]
Duchovni, E. [27 ]
Duckeck, G. [34 ]
Duerdoth, I. P. [17 ]
Etzion, E. [23 ]
Fabbri, F. [3 ,4 ]
Ferrari, P. [1 ]
机构
[1] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland
[2] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
[3] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy
[4] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[5] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
[6] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA
[7] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[8] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada
[9] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[10] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[11] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany
[12] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany
[13] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[14] Queen Mary Univ London, London E1 4NS, England
[15] TH Aachen, Inst Phys 3, D-52056 Aachen, Germany
[16] UCL, London WC1E 6BT, England
[17] Univ Manchester, Schuster Lab, Sch Phys & Astron, Manchester M13 9PL, Lancs, England
[18] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[19] Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada
[20] Univ Oregon, Dept Phys, Eugene, OR 97403 USA
[21] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[22] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
[23] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel
[24] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 1130033, Japan
[25] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[26] Kobe Univ, Kobe, Hyogo 6578501, Japan
[27] Weizmann Inst Sci, Particle Phys Dept, IL-76100 Rehovot, Israel
[28] Univ Hamburg, DESY, Inst Expt Phys, D-22607 Hamburg, Germany
[29] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada
[30] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada
[31] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada
[32] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary
[33] Inst Nucl Res, H-4001 Debrecen, Hungary
[34] Univ Munich, D-85748 Garching, Germany
[35] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[36] Yale Univ, Dept Phys, New Haven, CT 06520 USA
[37] Berg Univ Wuppertal, Wuppertal, Germany
[38] Univ Calif San Diego, San Diego, CA 92103 USA
基金
美国国家科学基金会;
关键词
W-PAIR PRODUCTION; MONTE-CARLO; OPAL DETECTOR; NEUTRALINO PRODUCTION; STANDARD MODEL; MASSLESS PARTICLES; BHABHA SCATTERING; E+E ANNIHILATION; EVENT GENERATOR; CROSS-SECTIONS;
D O I
10.1016/j.physletb.2009.09.010
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Z(0) boson in e(+)e(-) collisions at energies between 183 and 209 GeV. The search is based on data samples collected by the OPAL detector at LEP corresponding to an integrated luminosity of about 660 pb(-1). The analysis aims to select events containing the hadronic decay products of the Z(0) boson and large missing momentum, as expected from Higgs boson decay into a pair of stable weakly interacting neutral particles, such as the lightest neutralino in the Minimal Supersymmetric Standard Model. The same analysis is applied to a search for nearly invisible Higgs boson cascade decays into stable weakly interacting neutral particles. No excess over the expected background from Standard Model processes is observed. Limits on the production of invisibly decaying Higgs bosons produced in association with a Z(0) boson are derived. Assuming a branching ratio BR(h(0) -> invisible) = 1, a lower limit of 108.2 GeV is placed on the Higgs boson mass at the 95% confidence level. Limits on the production of nearly invisibly decaying Higgs bosons are also obtained. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:381 / 390
页数:10
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